B: Building located in city center, with 50% of buildings adjacent over 70 ft. in height. Urban and suburban with surrounding obstructions less than 3 stories high.C: Open fields with scattered obstructions, or rolling hills.D: Flat and unobstructed areas for at least 1 mile adjacent to building. (coastal areas / plains)

Check Appropriate Description:

Enclosed: All sides are walled.Partially Enclosed: At least half the sides are walled. (garages, hangars)Open: No walls. (canopies, pavilions)

Building usage & approx. number of occupants at any time in a specific area: (e.g. School-1,200 students in auditorium):